<?php 
$kullanicilar = $wpdb->get_results("SELECT user_nicename, user_url FROM $wpdb->users ORDER BY ID DESC LIMIT 5"); 

foreach ($kullanicilar as $kullanici) { 
    echo '<li><a href="http://localhost/wp/author/'.$kullanici->user_nicename.'">'.$kullanici->user_nicename."</a></li>"; 
} 
?>